WO2022202822A1 - 接着性組成物および積層体 - Google Patents
接着性組成物および積層体 Download PDFInfo
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- WO2022202822A1 WO2022202822A1 PCT/JP2022/013216 JP2022013216W WO2022202822A1 WO 2022202822 A1 WO2022202822 A1 WO 2022202822A1 JP 2022013216 W JP2022013216 W JP 2022013216W WO 2022202822 A1 WO2022202822 A1 WO 2022202822A1
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- polyolefin resin
- mass
- adhesive composition
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- modified
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/46—Reaction with unsaturated dicarboxylic acids or anhydrides thereof, e.g. maleinisation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
Definitions
- the present invention relates to adhesive compositions and laminates.
- polyolefin resins have been used in various fields such as packaging materials.
- polyolefin resin since polyolefin resin has low polarity, it has low adhesion to materials with higher polarity (highly polar materials) than polyolefin resin.
- a modified polyolefin resin obtained by modifying a polyolefin resin with a compound having an acid anhydride of ⁇ , ⁇ -carboxylic acid and a benzene ring has been proposed (for example, , see Patent Document 1).
- the primer layer is required to have even greater adhesiveness.
- the present invention provides an adhesive composition and a laminate that have excellent adhesion between a substrate made of a polyolefin resin and a surface layer made of a material having a higher polarity than the polyolefin resin, and that have excellent coatability.
- the present invention [1] is an adhesive composition containing a modified polyolefin resin, wherein the modified polyolefin resin is obtained by modifying a polyolefin resin with an unsaturated carboxylic acid and a radical-reactive aromatic compound, and the polyolefin resin
- the heat of fusion measured according to JIS K7122 is 10 J / g or less
- the modified amount of the unsaturated carboxylic acid in the modified polyolefin resin is more than 0.5% by mass and less than 5% by mass
- the amount of modification of the modified polyolefin resin with the radical-reactive aromatic compound is 0.1% by mass or more and less than 3% by mass.
- the present invention [2] includes the adhesive composition according to [1] above, wherein the amount of modification of the modified polyolefin resin with the radical-reactive aromatic compound is 0.5% by mass or more.
- the present invention is the adhesive composition according to claim 1 or 2, wherein the modified polyolefin resin is modified with the unsaturated carboxylic acid in an amount of 1.1% by mass or more.
- the present invention [4] is a substrate made of a polyolefin resin, a primer layer made of the adhesive composition according to any one of [1] to [3] above, and a material having a higher polarity than the polyolefin resin. and a surface layer consisting of and in order toward one side in the thickness direction.
- the polyolefin resin in the adhesive composition of the present invention is modified with an unsaturated carboxylic acid and a radical-reactive aromatic compound based on a predetermined amount of modification.
- the primer layer obtained using this adhesive composition has excellent adhesion to the base material made of polyolefin resin and excellent adhesion to the surface layer made of a material having a higher polarity than the polyolefin resin.
- the polyolefin resin has a heat of fusion within a predetermined range.
- the primer layer obtained using this adhesive composition has excellent adhesion to the substrate made of polyolefin resin.
- the laminate of the present invention comprises a primer layer made of the adhesive composition of the present invention. Therefore, the adhesion between the substrate made of polyolefin resin and the surface layer made of a material having a higher polarity than that of polyolefin resin is excellent.
- FIG. 1 is a schematic diagram showing one embodiment of the laminate of the present invention.
- FIG. 2 is a schematic diagram showing one embodiment of the method for manufacturing a laminate of the present invention.
- FIG. 2A shows the first step of preparing a polyolefin substrate.
- FIG. 2B shows the second step of arranging a primer layer on one surface in the thickness direction of the polyolefin base material.
- FIG. 2C shows the third step of arranging the surface layer on one side in the thickness direction of the primer layer.
- the adhesive composition contains a modified polyolefin resin.
- a modified polyolefin resin is obtained by modifying a polyolefin resin with an unsaturated carboxylic acid and a radical-reactive aromatic compound.
- a polyolefin resin is an olefin polymer containing structural units derived from an olefin.
- olefins examples include ⁇ -olefins.
- ⁇ -olefins examples include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1- Hexadecene, 1-octadecene, and 1-eicosene are included.
- the olefins preferably include ⁇ -olefins having 2 to 6 carbon atoms, more preferably ethylene, propylene, and 1-butene.
- the olefins can be used singly or in combination of two or more.
- Preferable examples include combined use of ethylene and propylene, and combined use of ethylene, propylene and 1-butene. That is, the polyolefin resins are preferably propylene/ethylene copolymers and propylene/1-butene/ethylene copolymers.
- the content of the propylene-derived structural units is, for example, 60 mols per 100 mol% of the total amount of the propylene-derived structural units and the ethylene-derived structural units. % or more, preferably 70 mol % or more, and for example, 90 mol % or less, preferably 80 mol % or less.
- the content of structural units derived from ethylene is, for example, 10 mol % or more, preferably 20 mol % or more, and for example, 40 mol % or less, preferably 30 mol % or less.
- the total amount of propylene-derived structural units, 1-butene-derived structural units, and ethylene-derived structural units is 100 mol%.
- the content of propylene-derived structural units is, for example, 50 mol % or more, preferably 60 mol % or more, and for example, 80 mol % or less, preferably 70 mol % or less.
- the content of structural units derived from 1-butene is, for example, 5 mol % or more, preferably 10 mol % or more, and for example, 30 mol % or less, preferably 20 mol % or less.
- the content of structural units derived from ethylene is, for example, 10 mol % or more, preferably 20 mol % or more, and for example, 40 mol % or less, preferably 30 mol % or less.
- the heat of fusion of the polyolefin resin measured according to JIS K7122 is 10 J/g or less, preferably 5 J/g or less, more preferably 3 J/g or less, and usually 0 J/g or more.
- the primer layer 3 (described later) obtained using this adhesive composition has excellent adhesion to the polyolefin substrate 2 (described later).
- the melting point of the polyolefin resin is, for example, 50°C or higher, preferably 60°C or higher, more preferably 70°C or higher, and for example, 115°C or lower, preferably 113°C or lower, more preferably 110°C. It is below.
- It may also be amorphous without polyolefin resin.
- the weight average molecular weight of the polyolefin resin measured by gel permeation chromatography (GPC) in terms of polystyrene is, for example, 40,000 or more, preferably 50,000 or more, more preferably 55,000 or more, and, for example, 500,000 or less. , preferably 400,000 or less, more preferably 380,000 or less.
- a polyolefin resin is obtained by polymerizing an olefin by a known method. Moreover, in the polymerization, if necessary, a metallocene catalyst can be blended.
- Examples of unsaturated carboxylic acids include unsaturated carboxylic acids having 3 to 8 carbon atoms.
- unsaturated carboxylic acids having 3 to 8 carbon atoms include monobasic acids and dibasic acids.
- Monobasic acids include, for example, (meth)acrylic acid (acrylic acid and/or methacrylic acid), crotonic acid, and isocrotonic acid.
- Diacids include, for example, maleic acid, fumaric acid, itaconic acid, citraconic acid, mesaconic acid, glutaconic acid, allylsuccinic acid, nadic acid, methylnadic acid, tetrahydrofumaric acid, and methylhexahydrophthalic acid.
- unsaturated carboxylic acids include acid anhydrides of the above unsaturated carboxylic acids.
- the unsaturated carboxylic acid preferably includes an acid anhydride of an unsaturated carboxylic acid, more preferably an acid anhydride of a dibasic acid, and still more preferably maleic anhydride.
- the unsaturated carboxylic acid can be used alone or in combination of two or more.
- the modified amount of the unsaturated carboxylic acid in the modified polyolefin resin exceeds 0.5% by mass, preferably 1.1% by mass or more, and is less than 5% by mass, preferably 3% by mass or less, more preferably. is 2% by mass or less.
- the primer layer 3 (described later) obtained using this adhesive composition has excellent adhesion to the surface layer 4 (described later) and the polyolefin base material 2 (described later). and particularly excellent in adhesion to the surface layer 4 (described later). In addition, especially when the amount of modification is 1.1% by mass or more, the adhesion is further improved.
- the primer layer 3 (described later) obtained using this adhesive composition has excellent adhesion to the surface layer 4 (described later) and the polyolefin base material 2 ( (to be described later), and particularly to the polyolefin base material 2 (to be described later).
- the amount of modification described above can be obtained, for example, from the mixing ratio of each component when preparing the modified polyolefin resin. Also, it can be confirmed by known means such as 1 H-NMR measurement of the modified polyolefin resin.
- a radical-reactive aromatic compound is a compound having both a radical-addable site and an aromatic ring.
- radically reactive aromatic compounds include radically polymerizable double bond-containing aromatic compounds and radically reactive aromatic hydrocarbons.
- a radically polymerizable double bond-containing aromatic compound is a compound that has both a radically polymerizable double bond and an aromatic ring
- Examples of radically polymerizable double bond-containing aromatic compounds include aromatic vinyl compounds and aromatic ring-containing (meth)acrylic acid esters.
- aromatic vinyl compounds include styrene, ⁇ -methylstyrene (2-phenylpropylene), 2-phenylbutene, 3-phenylpropylene, divinylbenzene, 1-vinylnaphthalene, p-methylstyrene, m-methylstyrene, o-methylstyrene, p-ethylstyrene, m-ethylstyrene, o-ethylstyrene, 2,4-dimethylstyrene, 2,5-dimethylstyrene, 3,4-dimethylstyrene, 3,5-dimethylstyrene, 3- Examples include methyl-5-ethylstyrene, p-tert-butylstyrene, p-sec-butyl
- aromatic ring-containing (meth)acrylate esters examples include phenyl (meth)acrylate, benzyl (meth)acrylate, phenoxyethyl (meth)acrylate, and trityl (meth)acrylate.
- Radical-reactive aromatic hydrocarbons include, for example, toluene, xylene, and ethylbenzene.
- the radical-reactive aromatic compound preferably includes a radically polymerizable double bond-containing aromatic compound, more preferably an aromatic vinyl compound, and still more preferably styrene.
- the modified amount of the radical-reactive aromatic compound in the modified polyolefin resin is 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 1.0% by mass or more. It is less than mass %, preferably 2 mass % or less, more preferably 1.5 mass % or less, still more preferably 1.1 mass % or less.
- the primer layer 3 (described later) obtained using this adhesive composition has excellent adhesion to the polyolefin substrate 2 (described later). In addition, especially when the amount of modification is 0.5% by mass or more, the adhesion is further improved.
- the amount of modification is equal to or less than the upper limit, an increase in the viscosity of the adhesive composition can be suppressed, resulting in excellent applicability (specifically, spray applicability).
- the amount of modification described above can be obtained, for example, from the mixing ratio of each component when preparing the modified polyolefin resin. Also, it can be confirmed by known means such as 1 H-NMR measurement of the modified polyolefin resin.
- a modified polyolefin resin is obtained by modifying a polyolefin resin with an unsaturated carboxylic acid and a radical-reactive aromatic compound.
- the polyolefin resin is graft-modified with the unsaturated carboxylic acid and the radical-reactive aromatic compound.
- the reaction temperature is, for example, 50°C or higher, preferably 80°C or higher, and, for example, 250°C or lower.
- the reaction time is, for example, 1 minute or more and 10 hours or less.
- a radical polymerization initiator is blended in an appropriate proportion.
- Radical polymerization initiators include, for example, benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di(peroxybenzoate)hexyne-3, 1,4 -bis(tert-butylperoxyisopropyl)benzene, lauroyl peroxide, tert-butylperacetate, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, 2,5-dimethyl-2,5 -di(tert-butylperoxy)hexane, tert-butylbenzoate, tert-butylperphenylacetate, tert-butylperisobutyrate, tert-butylper-sec-octoate, tert-butylperpivalate, cumylperpivalate and organic peroxid
- Radical polymerization initiators include dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, 2,5-dimethyl-2,5-di Dialkyl peroxides such as (tert-butylperoxy)hexane, 1,4-bis(tert-butylperoxyisopropyl)benzene are preferred.
- reaction is carried out in the presence or absence of a solvent.
- a known solvent can be selected as the solvent.
- a modified polyolefin resin is thus obtained. Moreover, when implementing the said reaction in presence of a solvent, the obtained modified polyolefin resin is prepared as a varnish.
- the melting point of the modified polyolefin resin is, for example, 50° C. or higher, preferably 60° C. or higher, more preferably 70° C. or higher, and for example, 115° C. or lower, preferably 113° C. or lower, more preferably 110° C. °C or less.
- It may also be amorphous without modified polyolefin resin.
- the weight average molecular weight of the modified polyolefin resin measured by gel permeation chromatography (GPC) in terms of polystyrene is, for example, 40,000 or more, preferably 50,000 or more, more preferably 55,000 or more, or, for example, 500,000. Below, it is preferably 400,000 or less, and more preferably 380,000 or less.
- the adhesive composition contains the modified polyolefin resin described above and a solvent blended as necessary.
- the solid content concentration of the modified polyolefin resin is, for example, 1.0% by mass or more, preferably 3.0% by mass or more, and, for example, 30% by mass or less, preferably is 20% by mass or less.
- the primer layer 3 (described later) obtained using the adhesive composition has both adhesion to the polyolefin base material 2 (described later) and adhesion to the surface layer 4 (described later). Excellent. Therefore, the adhesive composition is suitably used for forming a primer layer arranged between the polyolefin substrate 2 (described later) and the surface layer 4 (described later).
- the vertical direction on the page is the vertical direction (thickness direction)
- the upper side on the page is the upper side (one side in the thickness direction)
- the lower side on the page is the lower side (the other side in the thickness direction).
- the left-right direction and the depth direction on the paper surface are plane directions orthogonal to the up-down direction. Specifically, it conforms to the directional arrows in each figure.
- the laminate 1 has a film shape (including a sheet shape) with a predetermined thickness, as shown in FIG.
- the laminate 1 extends in a plane direction perpendicular to the thickness direction.
- the laminate 1 has a flat upper surface and a flat lower surface.
- the laminate 1 includes a polyolefin base material 2, a primer layer 3, and a surface layer 4 in order toward one side in the thickness direction.
- the laminate 1 includes a polyolefin substrate 2, a primer layer 3 directly disposed on the upper surface (one surface in the thickness direction) of the polyolefin substrate 2, and a primer layer 3 on the upper surface (one surface in the thickness direction) of the primer layer 3. and a directly disposed surface layer 4 .
- the polyolefin base material 2 has a film shape.
- the polyolefin base material 2 is arranged on the entire bottom surface of the primer layer 3 so as to be in contact with the bottom surface of the primer layer 3 .
- the polyolefin base material 2 is made of polyolefin resin.
- polyolefin resins examples include the polyolefin resins exemplified in the adhesive composition described above.
- the primer layer 3 has a film shape.
- the primer layer 3 is arranged on the entire bottom surface of the surface layer 4 so as to be in contact with the bottom surface of the surface layer 4 .
- the primer layer 3 is formed from an adhesive composition.
- the primer layer 3 is obtained by applying an adhesive composition to one surface of the polyolefin base material 2 in the thickness direction.
- the thickness of the primer layer 3 is, for example, 1 ⁇ m or more and, for example, 5 ⁇ m or less.
- the surface layer 4 has a film shape.
- the surface layer 4 is arranged on the entire upper surface of the primer layer 3 so as to be in contact with the upper surface of the primer layer 3 .
- the surface layer 4 is the top layer of the laminate 1 .
- the surface layer 4 is made of a material having a higher polarity than polyolefin resin (highly polar material).
- Such highly polar materials include resins having ether bonds, ester bonds, amide bonds, imide bonds, and urethane bonds.
- resins having ether bonds, ester bonds, amide bonds, imide bonds, and urethane bonds include acrylic resins, polyamide resins, polyimide resins, polyurethane resins, and vinyl chloride/vinyl acetate copolymer resins, preferably acrylic resins and vinyl chloride/vinyl acetate copolymer resins. mentioned.
- the thickness of the surface layer 4 is, for example, 6 ⁇ m or more and, for example, 20 ⁇ m or less.
- the method for producing the laminate 1 includes a first step of preparing the polyolefin base material 2, a second step of disposing the primer layer 3 on one side in the thickness direction of the polyolefin base material 2, and a and a third step of arranging the surface layer 4 .
- a polyolefin base material 2 is prepared as shown in FIG. 2A.
- the primer layer 3 is arranged on one surface of the polyolefin base material 2 in the thickness direction.
- the adhesive composition modified polyolefin resin varnish
- the primer layer 3 is arranged (formed) on one surface in the thickness direction of the polyolefin base material 2 .
- the application method is not particularly limited, but preferably includes spray application from the viewpoint of productivity.
- the drying conditions are not particularly limited as long as the volatile matter such as the organic solvent contained in the adhesive composition volatilizes. 10°C or higher.
- the drying time is, for example, 3 seconds or longer, preferably 1 minute or longer, and, for example, 1 hour or shorter.
- the surface layer 4 is arranged on one side of the primer layer 3 in the thickness direction, as shown in FIG. 2C.
- the material for the surface layer 4 is applied to one surface of the primer layer 3 in the thickness direction, and dried if necessary. As a result, the surface layer 4 is arranged (formed) on one surface of the primer layer 3 in the thickness direction.
- the drying conditions are not particularly limited as long as the volatile matter such as the organic solvent contained in the material of the surface layer 4 volatilizes. , above 10°C.
- the drying time is, for example, 3 seconds or longer, preferably 1 minute or longer, and, for example, 1 hour or shorter.
- the laminate 1 is thus obtained.
- the modified polyolefin resin in the adhesive composition is a polyolefin resin modified with an unsaturated carboxylic acid and a radical-reactive aromatic compound based on a predetermined modification amount.
- the primer layer 3 obtained using this adhesive composition has excellent adhesion to the polyolefin substrate 2 and adhesion to the surface layer 4 .
- the polarity of the primer layer 3 increases and the adhesion to the surface layer 4 with relatively high polarity improves, while the polyolefin base material with relatively low polarity There is a tendency for the adhesion with 2 to decrease.
- the modified amount of the radical-reactive aromatic compound is increased, the adhesion to the polyolefin base material 2 is improved, but the coatability tends to be lowered.
- both the modified amount of the unsaturated carboxylic acid and the modified amount of the radical-reactive aromatic compound are adjusted within a predetermined range.
- the coating property of the adhesive composition is improved, and the primer layer 3 obtained using this adhesive composition has excellent adhesion to the polyolefin substrate 2 and adhesion to the surface layer 4. .
- the polyolefin base material 2 having relatively low polarity and the surface layer 4 having relatively high polarity can be bonded through the primer layer 3 .
- the polyolefin resin has a heat of fusion within a predetermined range.
- the primer layer 3 obtained using this adhesive composition has excellent adhesion to the polyolefin substrate 2 .
- a polyolefin resin is composed of an acid anhydride of ⁇ , ⁇ -carboxylic acid (specifically, maleic anhydride) and a compound having a benzene ring (specifically, benzylamine). It is obtained by denaturing with Specifically, a polyolefin resin is first graft-modified with maleic anhydride. After that, the carboxyl group of maleic anhydride ring-opened by modification is reacted with the amino group of benzylamine. Then, benzylamine inhibits adhesion with the polyolefin base material 2 .
- both the unsaturated carboxylic acid and the radically reactive aromatic compound are graft modified by radical reaction to the polyolefin resin.
- the modified polyolefin resin of the present invention is obtained by graft-modifying both the unsaturated carboxylic acid and the radical-reactive aromatic compound to one molecule of the polyolefin resin.
- a distinction is made between one in which an unsaturated carboxylic acid is graft-modified and a mixture in which one molecule of polyolefin resin is graft-modified with a radically reactive aromatic compound.
- the radical-reactive aromatic compound is efficiently introduced into the polyolefin resin, and the adhesion with the polyolefin base material 2 is improved.
- the laminate 1 also includes a primer layer 3 made of the adhesive composition described above. Therefore, the adhesion between the polyolefin base material 2 and the surface layer 4 is excellent.
- the laminate 1 is suitably used in various fields such as packaging materials.
- the surface layer 4 is a single layer.
- the surface layer 4 may be multi-layered (for example, two or more layers, preferably two or three layers).
- the polyolefin base material 2 has a film shape, but the shape of the polyolefin base material 2 is not limited to this, and may be plate-like, for example.
- Adhesive Composition 100 parts by mass of a propylene/ethylene copolymer (PER) containing 79 mol% of propylene units and 21 mol% of ethylene units and 516 parts by mass of butyl acetate were placed in an autoclave having an internal volume of 1.0 L equipped with a stirrer and stirred. , and the temperature was raised to 145° C. to completely dissolve the propylene/ethylene copolymer.
- PER propylene/ethylene copolymer
- Example 4 a propylene-butene-ethylene copolymer (PBER) containing 66 mol% of propylene units, 13 mol% of butene units, and 21 mol% of ethylene units was used.
- PBER propylene-butene-ethylene copolymer
- Comparative example 7 50 parts by mass of a propylene/ethylene copolymer containing 79 mol% of propylene units and 21 mol% of ethylene units and 261.6 parts by mass of butyl acetate were added to an autoclave having an internal volume of 1.0 L equipped with a stirrer, and the mixture was stirred. The temperature was raised to 145° C. to completely dissolve the propylene/ethylene polymer.
- Comparative example 8 100 parts by mass of a propylene/ethylene copolymer containing 79 mol% of propylene units and 21 mol% of ethylene units and 537.6 parts by mass of butyl acetate were placed in an autoclave with an internal volume of 1.0 L equipped with a stirrer, and the mixture was stirred. The temperature was raised to 145° C. to completely dissolve the propylene/ethylene polymer.
- the reference chemical shift is based on the hydrogen of tetramethylsilane of 0 ppm (the peak derived from the residual hydrogen of the deuterated ortho-dichlorobenzene is set to 7.10 ppm as the reference value for the chemical shift, and similar results are obtained. Obtainable). Peaks such as 1H derived from functional group-containing compounds were assigned by a conventional method.
- the melting points of the polyolefin resin used in each example and the modified polyolefin resin of each example were measured. Specifically, using a differential scanning calorimeter (manufactured by TA Instruments; DSC-Q1000), the temperature was raised from 25 ° C. to 200 ° C. at 10 ° C./min, then held at 200 ° C. for 3 minutes, and heated at 10 ° C./min. In the process of lowering the temperature to 0° C. and again raising the temperature to 200° C. at 10° C./min, the melting point was determined according to JIS K7122 from the thermogram at the time of the second heating. Table 1 shows the results.
- Weight Average Molecular Weight The weight average molecular weight was measured for the polyolefin resin used in each example and the modified polyolefin resin for each example. Specifically, based on the GPC method, the weight average molecular weight was measured under the following measurement conditions. Table 1 shows the results. Detector: manufactured by Shimadzu Corporation; C-R4A Column: TSKG 6000H-TSKG 4000H-TSKG 3000H-TSKG 2000H (manufactured by Tosoh Corporation) Moving bed: tetrahydrofuran column Temperature: 40°C Flow rate: 0.8ml/min Mw was calculated using a calibration curve prepared from monodisperse standard polystyrene.
- ⁇ Second step> The adhesive composition of each example and each comparative example was spray-coated on one side in the thickness direction of a polypropylene plate and dried at 60° C. for 2 minutes. As a result, a primer layer having a thickness of 2 ⁇ m to 3 ⁇ m was obtained.
- ⁇ Third step> An acrylic paint was spray-coated on one side of the primer layer in the thickness direction and dried at 60° C. for 3 minutes. The acrylic paint was then cured by UV irradiation. Thereby, a surface layer having a thickness of 10 ⁇ m to 15 ⁇ m was formed. As described above, the laminate A was manufactured.
- a paint made of vinyl chloride/vinyl acetate copolymer resin was sprayed and dried at 60°C for 3 minutes.
- a first surface layer having a thickness of 5 ⁇ m to 6 ⁇ m was formed.
- an acrylic paint was spray-coated on one side in the thickness direction of this surface layer and dried at 60° C. for 3 minutes.
- the acrylic paint was then cured by UV irradiation. Thereby, a second surface layer having a thickness of 10 ⁇ m to 15 ⁇ m was formed.
- the laminate B was manufactured.
- adhesion between polypropylene and the primer layer (PP adhesion), the adhesion between the surface layer made of acrylic paint and the primer layer (acrylic adhesion), and the vinyl chloride/vinyl acetate copolymer resin
- PP adhesion polypropylene and the primer layer
- acrylic adhesion adhesion between the surface layer made of acrylic paint and the primer layer
- vinyl chloride/vinyl acetate copolymer resin Adhesion to vinyl chloride/vinyl acetate copolymer resin
- the adhesive composition and laminate of the present invention can be suitably used, for example, as packaging materials.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
ポリオレフィン樹脂は、オレフィン由来の構成単位を含むオレフィン重合体である。
不飽和カルボン酸としては、例えば、炭素数3~8の不飽和カルボン酸が挙げられる。炭素数3~8の不飽和カルボン酸としては、例えば、一塩基酸、および、二塩基酸が挙げられる。一塩基酸としては、例えば、(メタ)アクリル酸(アクリル酸および/またはメタクリル酸)、クロトン酸、および、イソクロトン酸が挙げられる。二塩基酸としては、例えば、マレイン酸、フマル酸、イタコン酸、シトラコン酸、メサコン酸、グルタコン酸、アリルコハク酸、ナジック酸、メチルナジック酸、テトラヒドロフマル酸、および、メチルヘキサヒドロフタル酸が挙げられる。
ラジカル反応性芳香族化合物は、ラジカル付加可能な部位および芳香環を併有する化合物である。
変性ポリオレフィン樹脂は、ポリオレフィン樹脂を、不飽和カルボン酸およびラジカル反応性芳香族化合物によって変性することにより得られる。
図1を参照して、本発明の積層体の一実施形態を説明する。
ポリオレフィン基材2は、フィルム形状を有する。ポリオレフィン基材2は、プライマー層3の下面に接触するように、プライマー層3の下面全面に、配置されている。
プライマー層3は、フィルム形状を有する。プライマー層3は、表面層4の下面に接触するように、表面層4の下面全面に、配置されている。
表面層4は、フィルム形状を有する。表面層4は、プライマー層3の上面に接触するように、プライマー層3の上面全面に、配置されている。表面層4は、積層体1の最上層である。
積層体1の製造方法は、ポリオレフィン基材2を準備する第1工程と、ポリオレフィン基材2の厚み方向一方面にプライマー層3を配置する第2工程と、プライマー層3の厚み方向一方面に表面層4を配置する第3工程とを備える。
接着性組成物における変性ポリオレフィン樹脂は、ポリオレフィン樹脂が、不飽和カルボン酸およびラジカル反応性芳香族化合物によって、所定の変性量に基づいて、変性されている。これにより、この接着性組成物を用いて得られるプライマー層3は、ポリオレフィン基材2との密着性、および、表面層4との密着性に優れる。
実施例1
撹拌機が取付られた内容積1.0Lのオートクレーブに、プロピレン単位79モル%およびエチレン単位21モル%のプロピレン・エチレン共重合体(PER)100質量部および酢酸ブチル516質量部を入れ、撹拌下、145℃に昇温し、プロピレン・エチレン共重合体を完全に溶解させた。
実施例1と同様の手順に基づいて、変性ポリオレフィン樹脂を含む接着性組成物を得た。
撹拌機が取付られた内容積1.0Lのオートクレーブに、プロピレン単位79モル%およびエチレン単位21モル%のプロピレン・エチレン共重合体50質量部および酢酸ブチル261.6質量部を入れ、撹拌下、145℃に昇温し、プロピレン・エチレン重合体を完全に溶解させた。
撹拌機が取付られた内容積1.0Lのオートクレーブに、プロピレン単位79モル%およびエチレン単位21モル%のプロピレン・エチレン共重合体100質量部および酢酸ブチル537.6質量部を入れ、撹拌下、145℃に昇温し、プロピレン・エチレン重合体を完全に溶解させた。
各実施例および各比較例で用いられたポリオレフィン樹脂について、示差走査熱量計(TA Instruments製;DSC-Q1000)を用いて、融解熱量を求めた。
10℃/分で30℃から180℃まで昇温後、10℃/分で0℃まで降温し、再度10℃/分で150℃まで昇温する過程において、2度目の昇温時のサーモグラムより、JIS K 7122に准じて融点と融解熱量を求めた。その結果を表1に示す。
ポリオレフィン樹脂に対する不飽和カルボン酸の変性量、および、ポリオレフィン樹脂に対するラジカル反応性芳香族化合物の変性量について、以下の条件に基づき、1H-NMR測定を用いて測定した。その結果を表1に示す。
[測定条件]
装置:日本電子(株)製ECX400型核磁気共鳴装置
溶媒:重水素化オルトジクロロベンゼン
試料濃度:20mg/0.6mL
測定温度:120℃
観測核:1H(400MHz)
シーケンス:シングルパルス
パルス幅:5.12μ秒(45°パルス)
繰り返し時間:7.0秒
積算回数:500回以上
各実施例で用いられたポリオレフィン樹脂、および、各実施例の変性ポリオレフィン樹脂について、融点を測定した。具体的には、示差走査熱量計(TA Instruments製;DSC-Q1000)を用いて、10℃/minで25℃から200℃まで昇温後、200℃で3分間保持し、10℃/minで0℃まで降温し、再度10℃/minで200℃まで昇温する過程において、2度目の昇温時のサーモグラムより、JIS K7122に准じて融点を求めた。その結果を表1に示す。
各実施例で用いられたポリオレフィン樹脂、および、各実施例の変性ポリオレフィン樹脂について、重量平均分子量を測定した。具体的には、GPC法に基づき、以下の測定条件に基づき、重量平均分子量を測定した。その結果を表1に示す。
検出器:島津製作所社製;C-R4A
カラム:TSKG 6000H-TSKG 4000H-TSKG 3000H-TSKG 2000H(東ソー社製)
移動層:テトラヒドロフラン
カラム温度:40℃
流量:0.8ml/min
単分散標準ポリスチレンより作成した検量線を用いて、Mwを算出した。
[積層体Aの製造]
<第1工程>
ポリプロピレン板を準備した。
ポリプロピレン板の厚み方向一方面に、各実施例および各比較例の接着性組成物をスプレー塗布し、60℃で2分間乾燥させた。これにより、厚み2μm~3μmのプライマー層を得た。
プライマー層の厚み方向一方面に、アクリル系塗料をスプレー塗装し、60℃で3分間乾燥させた。次いで、UV照射によりアクリル系塗料を硬化させた。これにより、厚み10μm~15μmの表面層を形成した。以上により、積層体Aを製造した。
積層体Aと同様の手順に基づいて、積層体Bを製造した。
[密着性]
各実施例および各比較例の積層体Aおよび積層体Bにおいて、表面層を碁盤目(2mm間隔、100マス)にカットし、ポリプロピレン板または表面層のセロハン粘着テープによる剥離テストを実施した。付着率(基材に残ったマスの数)により密着性を評価した。
各実施例および各比較例の積層体Aおよび積層体Bについて、碁盤目試験によりプロピレン板とプライマー層間の付着率を評価し、PP密着性を下記基準で判断した。その結果を表1に示す。
〇:付着率の平均が100であった。
△:付着率の平均が100未満、90以上であった。
×:付着率の平均が90未満であった。
各実施例および各比較例の積層体Aについて、碁盤目試験によりプライマー層と表面層(アクリル層)間の付着率を評価し、アクリル密着性を下記基準で判断した。その結果を表1に示す。
〇:付着率が100であった。
△:付着率が100未満、90以上であった。
×:付着率が90未満であった。
各実施例および各比較例の積層体Bについて、碁盤目試験によりプライマー層と表面層(塩化ビニル・酢酸ビニル系共重合樹脂層)間の付着率を評価し、塩化ビニル・酢酸ビニル系共重合樹脂密着性を下記基準で判断した。その結果を表1に示す。
〇:付着率が100であった。
△:付着率が100未満、90以上であった。
×:付着率が90未満であった。
各実施例および各比較例の接着性組成物について、B型粘度を測定し、スプレー適性を下記基準で判断した。
〇:粘度が40mPa・s未満であった。スプレー塗装できると判断した。
×:粘度が40mPa・s以上であった。スプレー塗装できないと判断した。
2 基材
3 プライマー層
4 表面層
Claims (4)
- 変性ポリオレフィン樹脂を含む接着性組成物であって、
前記変性ポリオレフィン樹脂は、ポリオレフィン樹脂が、不飽和カルボン酸およびラジカル反応性芳香族化合物によって変性されてなり、
前記ポリオレフィン樹脂の、JIS K7122に従って測定される融解熱が10J/g以下であり、
前記変性ポリオレフィン樹脂に対する前記不飽和カルボン酸の変性量が、0.5質量%を超過し、5質量%未満であり、
前記変性ポリオレフィン樹脂に対する前記ラジカル反応性芳香族化合物の変性量が、0.1質量%以上3質量%未満である、接着性組成物。 - 前記変性ポリオレフィン樹脂に対する前記ラジカル反応性芳香族化合物の変性量が、0.5質量%以上である、請求項1に記載の接着性組成物。
- 前記変性ポリオレフィン樹脂に対する前記不飽和カルボン酸の変性量が、1.1質量%以上である、請求項1に記載の接着性組成物。
- ポリオレフィン樹脂からなる基材と、
請求項1に記載の接着性組成物からなるプライマー層と、
前記ポリオレフィン樹脂よりも極性が高い材料からなる表面層とを厚み方向一方側に向かって順に備える、積層体。
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EP22775605.3A EP4316829A1 (en) | 2021-03-26 | 2022-03-22 | Adhesive composition and multilayer body |
US18/283,494 US20240174901A1 (en) | 2021-03-26 | 2022-03-22 | Adhesive composition and laminate |
CN202280016107.8A CN116867867A (zh) | 2021-03-26 | 2022-03-22 | 粘接性组合物及层叠体 |
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Citations (6)
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JPS537793A (en) * | 1976-07-12 | 1978-01-24 | Nippon Petrochemicals Co Ltd | Prcess for producing adhesive having improved waterrresistance on adhesion surface* |
JP2001139642A (ja) * | 1999-11-18 | 2001-05-22 | Nippon Paper Industries Co Ltd | 変性ポリオレフィン組成物およびその用途 |
JP2009114462A (ja) * | 2002-04-12 | 2009-05-28 | Idemitsu Kosan Co Ltd | 改質プロピレン系重合体の製造方法及びその方法で得られた改質プロピレン系重合体 |
WO2012060311A1 (ja) * | 2010-11-05 | 2012-05-10 | 株式会社カネカ | インサート成形用積層接着フィルム |
JP2017226845A (ja) * | 2017-07-12 | 2017-12-28 | 東洋インキScホールディングス株式会社 | 接着剤組成物、電池用包装材、及び電池用容器 |
WO2018037849A1 (ja) | 2016-08-24 | 2018-03-01 | 日本製紙株式会社 | 変性ポリオレフィン系樹脂 |
-
2022
- 2022-03-22 WO PCT/JP2022/013216 patent/WO2022202822A1/ja active Application Filing
- 2022-03-22 US US18/283,494 patent/US20240174901A1/en active Pending
- 2022-03-22 EP EP22775605.3A patent/EP4316829A1/en active Pending
- 2022-03-22 CN CN202280016107.8A patent/CN116867867A/zh active Pending
- 2022-03-22 JP JP2023509205A patent/JPWO2022202822A1/ja active Pending
- 2022-03-25 TW TW111111250A patent/TW202307037A/zh unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS537793A (en) * | 1976-07-12 | 1978-01-24 | Nippon Petrochemicals Co Ltd | Prcess for producing adhesive having improved waterrresistance on adhesion surface* |
JP2001139642A (ja) * | 1999-11-18 | 2001-05-22 | Nippon Paper Industries Co Ltd | 変性ポリオレフィン組成物およびその用途 |
JP2009114462A (ja) * | 2002-04-12 | 2009-05-28 | Idemitsu Kosan Co Ltd | 改質プロピレン系重合体の製造方法及びその方法で得られた改質プロピレン系重合体 |
WO2012060311A1 (ja) * | 2010-11-05 | 2012-05-10 | 株式会社カネカ | インサート成形用積層接着フィルム |
WO2018037849A1 (ja) | 2016-08-24 | 2018-03-01 | 日本製紙株式会社 | 変性ポリオレフィン系樹脂 |
JP2017226845A (ja) * | 2017-07-12 | 2017-12-28 | 東洋インキScホールディングス株式会社 | 接着剤組成物、電池用包装材、及び電池用容器 |
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US20240174901A1 (en) | 2024-05-30 |
CN116867867A (zh) | 2023-10-10 |
TW202307037A (zh) | 2023-02-16 |
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